Please answer A$,$B and C for a like

To determine the internal moments within a cantilever beam that has two different cross$-$sectional areas and two externally applied moments acting on it$,$ and to determine the radius of curvature for each section of the beam.

The cantilever beam ABC $($Figure $1)$ shown is composed of two solid cylindrical sections: $AB$ has a diameter of $d_1=4\mathrm{.}00$ in and $BC$ has a diameter of $d_2=5\mathrm{.}50$ in$.$ The two moments, $M_A=61\mathrm{.}0$kip$*ft$ and $M_B=70\mathrm{.}0$kip$*ft,$ are applied externally at points A and $B,$ respectively. Assume $EI$ is constant with $E=2\mathrm{.}9{10}^7$ and that $a=1\mathrm{.}00ft$ and $b=2\mathrm{.}50$ ft $.$

Figure

$1$ of $1$

Part A $-$ Internal bending moments in beam ABC

After drawing a free$-$body diagram, the first step in analyzing the deflections of beam ABC is to determine the internal bending moments in the different sections. Determine the bending moments in $AB,M_{AB},$ and in $BC,M_{BC}$ :

Express your answers in kip $*$ ft to three significant figures, separated by a comma.

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Part B $-$ Moments of inertia for portion $AB$ and portion $BC$ of the beam

Determine the moments of inertia for $AB,I_{AB},$ and $BC,I_{BC}.$

Express your answers in in ${?}^4$ to three significant figures, separated by a comma.

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Part C $-$ Radius of curvature for $AB$ and $BC$

Determine the radius of curvature for $AB,{}_{AB},$ and for $BC,{}_{BC},$

Express your answers in feet to three significant figures, separated by a comma.